I know how to figure out net carbs but does everyone do this right away? I've been doing low carb for almost 4 months and I still just eat what the package says for Carbs by it's self and I eat about 25-30 carbs a day.
I could eat a bunch more if I did use net carbs, I guess I just felt like it wouldn't work. I'm confused.

I basically use the regular carb count myself. I don't use many processed foods other than salad dressing. However, I think as I progress into OWL I will do the net carb count as the whole point is being able to eat more "normal" so to speak and maintain your loss.

some folks deduct sugar alcohol also. I have read that some folks find the sugar alcohol stalls them if they eat too much so they choose to deduct a portion of the sugar alcohol like 3/4 or 1/2 of it only. I think you have to find the info and figure out what's best for you. Some of the meal bars also deduct glycerin - I'm not sure if glycerin can stall you or not.

I do absolutely always deduct fiber. Most stuff high in fiber is pretty good for you anyway.

Fibre has no impact on blood glucose levels (BGL) and therefore does not need to be counted when figuring your carb intake.

Sugar Alcohols do have varying degrees of impact on BGL (depending on the version involved) and need to be counted - on average - by half. Other artificial sweeteners are not entirely without BGL impact either, and for some super-sensitive people, can have negative effects, too. Splenda (for example) is considered calorie-free when used a teaspoon at a time -- it is actually about 1/2 carb, or 2 calories per tsp -- but if you are cooking with it, you should count it as 24 carbs (96 calories) per cup. Nothing is really "free", I guess However, when compared to sugar at 192 carbs (770 calories) per cup; it's a pretty good deal.